Finding the Third Proportional to 561,858 and 1,228,818

Step by Step Solution

1. Step 1: Write the proportion equation
   561,858 : 1,228,818 = 1,228,818 : x
2. Step 2: Convert to fraction form
   561,858/1,228,818 = 1,228,818/x
3. Step 3: Cross multiply
   561,858x = 1,228,818 × 1,228,818
4. Step 4: Simplify right side
   561,858x = 1,509,993,677,124
5. Step 5: Solve for x
   x = 1,509,993,677,124/561,858
6. Step 6: Final answer
   x = 2,687,500.54